/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraScript.h
Callback issued whenever a VM script compilation successfully happened (even if the results are a script that cannot be executed due to errors)
[FOnScriptCompiled](API\Plugins\Niagara\UNiagaraScript\FOnScriptCompiled) & OnVMScriptCompiled()